Air-brake system.



G. J. PILGEH.

' AIR BRAKE SYSTEM.

Arms mun FILED JULYIO. 191s.

Patented July 30, 1918.

CYLlNDER Pt FE G. J F: LGER 1w! NORRIS PETERS co.. PNO70-LITNU..wnsnmcnzw; a c.

i To all whom it may concern:

' fiEQR -sT QIILGE Q F E NE NMBENNY YANEA al -BR KE erstw- Be it knownthat I, GEORGE J. PILGER, a

citizen .of the "United States, residing at Scranton, in the county ofLackawanna and .State of Pennsylvania, have invented certain new anduseful Improvements in Air- Brake Systems, of which the following is aspecification, reference 'being had to the accompanying drawings.

This invention relates to certain improve- :mentsin airbrake systems andhasrelation more particularly to an attachment especially designed andadapted for use in connection with a triple valve as=embodied in thesystem; and an object of the invention is to provide novel and improvedmeans whereby upon applying the brake,*theauxiliary reservoir pressureis prevented from flowing into the brake-pipe or train line.

The invention also has for an object to provide an attachment coactingwith the triple valve in an air brake system whereby" more fully setforth.

The novel features of the invention will hereinafter be definitelyclaimed.

In order that my invention may be the better understood, I will nowproceed to describe the same with reference to the accompanyingdrawings, wherein- 'Figure 1 is a diagrammatic view partly in elevationand partly in section illustrating an embodiment of my invention; and

Fig. 2 is a fragmentary sectional view illustrating a further embodimentof my invention.

As disclosed in the accompanying drawings, V denotes a triple valve ofthe well known type K and which includes the main piston 1 provided withthe piston ring 2 and which co-acts withflthe feed port 16 formed in theside wall of the piston chamber P. When thepiston 1 is on service lapposition the port3 is partially closed. The port 3 is in communication,through the medium of p fi i n Lett aten PatentedJuIy 30, 19.18.Application filed July 10,1916. Se1'ia1 No.108,4 01.

-:the line t with the port 5 produced inthe casing 6andwhich is also incommunication,

through the medium of, the line 7, Withthe auxiliary reservoir chamberof the triple j valve. 7 V

gThe casing-6 affords a valve chamber C and the-opposed walls of thechamber 0 areprovidedwith theports Sin communication withtheport 5-andaffording the valve seats 9 and 9 with which coast the valve member 10.

Theavalve member 10 as disclosed in Fig. l is carried' by the diaphragm11 intersectingthe chamber C whereby it will be peryoeived that the flowthrough the port "5 may !be controlled. The diaphragm 1-1 is alsoprovided with a restricted opening 12.

-i *When the piston l isin full release the port 3 is opened which willallow the air at the head end of the train to force the sufiicient toaccommodate the airv The air on the train pipe side of the diaphragmwill force the valve 10 to close the seat 9' and to maintain the sameclosed until sufficient air has passed through the restricted port 12and the pressure in the chamber C on opposite sides of the diaphragm 11is equalized,

then the tension of the diaphragm 11 will open the valve 6 and allow theair to flow into the auxiliary until the pressure on the diaphragm 11toward the auxiliary side, i theport or restricted opening 12beinginbrake pipe side of the diaphragm 11 again 1 causes the valve (6)to close and the diaphragm will continue to intermittently vibrate untilthere is a substantially permanent equalization of air upon thediaphragm 11. In applying the brake the piston 1 is in full serviceposition and the port 3 entirely closed resulting in the pressure fromthe auxiliary reservoir only acting u on the piston 1. When the piston 1goes ack to service lap as illustrated in Fig. l, of the accompanyingdrawings the port 3 will be partially opened. When the piston 1 is inservice lap and there is a leaky slide valve or a leaky graduatin valve(if not too great) this partial opening of the port 3 will permitpressure to be deliveredto the auxiliary and thereby prevent the brakefrom releasing.

In the form of invention illustrated in Fig. 2 in lieu of a diaphragm Iemploy a piston within a valve chamber 6 and which has the arms a and b"encircled by the equalizing-, springs l'wliich serve to norpiston 15 ina neutral vention is of .an extremely simple and com parativelyinexpensive nature'jand is particularly well adaptedvfor use byreason'of the'convenienceandfacility with which it may be assembled,anditwill also be obvious that my'invention is susceptible'of somechange and modificationwithout fmaterial thereof and'for this reason Idonot wish to cise arrangement and formation, of thesev- "invention inpractice,

ago 7' 1. In combination with the piston chamatriple valve, a valvechamber in communication with'thelpiston chamberattwo'points spacedlongitudinally said piston partially .b er and piston of eral pa'rtsherein shown in carryi'ng out my except as hereinafter.

7 .i'chamberand piston chamber,said partition normally maintainingposition. 7.. c V

" In testimony whereof 'I hereunto afiix my claimed. p Iclaim:

of the piston chamber, closing the point of communication remote fromthe auxiliary sideof the piston "when the piston is, on service lapposition, a vibra:

tory partitionintersecting the valve champ her and provided with arestricted opening,

and valve members carried by the partition for alternately opening andclosing the points of communication between the valve chamber and pistonchamber. r

2. In combination with the piston chamher and piston of a triple valve,a valve j; chamber in communication with the piston chamber at twopoints spaced'longitudinally ofthef piston chamber, said pistonpartially closing the point of communication'remote V p from theauxiliary side of the piston when fdeparture from' the principles andspirit I 15 the piston is on service lap position, a vibratory partitionintersecting the valve chain [be understood as limiting'myself tothe-preher and provided with a restricted opening,

7 and valve members carried by the partition for alternately "openingand" closingv the points of communication between the valve I r-witnessesr :1 V

j CHAS; 'HARTMAN,

, fcopic slot thiapatent may The obtained forifive cents, eachftyaddresslng'jh; f commissloner o t Patents,

{. -f j 1- rwashinztonfllfic." 1 J i the valves in open

